Overview General Settings Selection Settings View Settings Map Settings
To change settings associated with the entire map, select File | Properties (or press Alt+Enter), and click on the Grid & Snap tab.
Display design grid
When checked, a grid of dots is superimposed on the map to aid in design. The button on the Settings toolbar lets you quickly turn this feature on and off.
Snap to design grid
When checked, objects will be snapped to the closest grid point. The button on the Settings toolbar is a shortcut.
Grid Units
Sets the spacing between points on the design grid. Larger numbers are further apart.
Gravity-snap to existing points
Toggles gravity snap on and off, where handles are snapped to nearby objects on the map. The button on the Settings toolbar is a shortcut.
LEDs on snap buttons
The small green LEDs in the lower right corner of the snap buttons light up while during editing if either of those two snap methods is currently being applied. You can use this visual clue if you are having trouble moving an item where you want it to go: if a LED is lighting up, you may have to turn off one or both of the snaps to allow you to precisely place the object.